1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bef91b59707457a6325d7190aab2c559281c4c6000fa5650c26493de4be616. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/228a1b61-5a92-4e85-ac6c-cc46f49a7ac3.json and https://artists.proofprofile.net/proofs/artist/228a1b61-5a92-4e85-ac6c-cc46f49a7ac3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476d951c514cc174b8afc0751b72305c99c991e80c050a45a1fb8c7a09077a2d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2004001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476211526c01fbafd4838b18490dbf6ea5db3af539f6298ea9d9b062f82b502b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2006704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110b70df35cb231843c07b562fdc5c744b5569d2c3073ad1d76fb5659b2f8b1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2003301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271acee7eb7b697dda5fb355e6560b5e1d83f98a13a4dc51ac682ba824328e9d. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:47:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2006707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4299ace87cbb0997648ba11f6ee2309454f738b25f00dfc32691a755310c2c49. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2006710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2887e6a78c3a62fe9e6b74093a537e5ed851622c2b0e6cb1cdcf70fa1350a96d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2011401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd327a88be59ba4e7b48613d067ad024056ae017beb172e61643514e906e9053. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:09:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2012301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f0328d217be8eb81fd3538506c6d951d50d6c6eacf2f320a7bc4ea16f9fae06. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:08:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2101901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd20f3c2f22f03738eca519a0b9679d22115b4a2ee79b147b5e93661c54f881b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2106102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebd7b0b1af35317dd768eff0bd11709d024458406a2318c4ab9561edd47f02f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2112501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dd3639591390ac067fb968ce978f5a80652c156be2f0fe8e9956c81cafa546. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2114101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36edb2d1fa38c4dbf25702dc5d3f08524df5f4248a32dfb5a879dea5d07a096c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2115401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6513505e62c78d07e8c01157213fed754921caba1ccea202a23c86b1f0fe1d2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2120907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a7c390b5c94db62bdbce8dac7a18a41d0264144a89d273b83c1e96662d067. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2121901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18e8fa195545005bea18305000e06b69e0f30da751dc2925236ddb356a2cd2ca. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2123601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb13b66fabe4c12805fffdfef5b759b3f476ddf6dfc4d69ff51eed06bf54b14c. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:00:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2226202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ebd7b0b1af35317dd768eff0bd11709d024458406a2318c4ab9561edd47f02f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5ZV2112501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4462f42d2040e3967cfbbc9e0f17e0e1c3dfc467fe49b63af219c1448f3179cf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQX92401717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7500173e2630b3eeb69e0c99786da8a5a672ef64090b9b18e06715479a464dca. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQX92400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304fe2a57407360a075a9a9a229ddbd64ddc571a1096bb05ad11de83821dec3e. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQX92401715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2a848899fabd46127c53af7856255e9036518b5c82e42f0ba7666f00b1e09f. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQX92401713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798859057ebaa64a6d8389901b4b19996c6cc79e37c65e9e2042e0dd72631d81. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:30:17Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQX92401777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b090773c2c1e20564bc76baf4f69e98fa099eac323069b2dc696d934c8dd02. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USQX92401718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d16101d6ce5b1d5df401450c383398eeeffb06f6a27efe227028d9e5461d6f. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USSM12503965.